TW200425074A - Methods and apparatuses for reproducing and recording still picture and audio data and recording medium having data structure for managing reproduction of still picture and audio data - Google Patents

Abstract

In the method of reproducing still picture data and audio data from a recording medium, the still picture data and the audio data reproduced from the recording medium are decoded based on respective, independent system times (STCs).

Description

200425074 发明 Description of the invention: [Technical field to which the invention belongs] The present invention relates to various methods and equipment for copying and recording still pictures and audio data to a recording medium, which has a method for managing and recording still pictures and audio data. Data structure. [Previous Technology] The standardization of new high-density read-only and rewritable optical discs capable of recording large amounts of high-quality video and audio data has been rapidly progressing and new-type optical disc-related products are expected to have commercial use in the market in the near future. Blu-ray rewritable discs (BD-RE) and Blu-ray read-only discs (BD-ROM) are examples of these new types of discs. When the standard for Blu-ray Disc Rewritable Discs (BD-RE) has been announced, standardization of high-density read-only discs such as Blu-ray Discs (BD-ROMs) is still ongoing. Therefore, an effective data structure for managing the reproduction of still pictures recorded on a high-density read-only disc such as a BD-ROM is not yet available. SUMMARY OF THE INVENTION The recording medium according to the present invention includes a data structure for managing the reproduction of still pictures and audio data recorded on the recording medium. In an exemplary embodiment, the interpretation of still picture data and audio data copied from the recording medium is based on individual, independent system time (stcs). For example, the production of a first stc of still picture data is based on the still picture data copied from the recording medium, and the production of the second STC of audio data is based on the audio data copied from the recording medium. In an exemplary embodiment, the first STC is generated from program clock references (PCRs) in still picture data, and the second STC is generated from PCRs in audio data. In another exemplary embodiment, the interpretation of the still picture data and the audio data is based on the first and second STCs, respectively, and the display time stamps (PTSs) on the static • base picture and the audio data, respectively. The present invention further provides an apparatus and method for recording and copying data structures according to the present invention, and for recording and copying slides according to the present invention. [Embodiment] In order that the present invention may be thoroughly understood, exemplary embodiments will now be described with reference to the accompanying drawings. According to the present invention, a high-density recording medium, for example, a high-density & disc (for example, a Blu-RayROM (BD-ROM), BD-RE, etc.) may have a broadcast or data structure for Manage the copying of video and audio data as shown in Figure 1. According to one aspect of the data structure of the present invention as shown in Fig. 1, some aspects are similar to the conventional BD-RE standard. Therefore, these aspects will no longer be described. As shown in Figure 1, the root directory contains at least one BD directory. The BD directory includes general information files (not shown in the diagram); a playlist directory, which stores playlist files (eg, * .mPls); a clip information (CLIPINF) directory, which stores clip information 200425074 broadcast cases P.clpi); and a stream (STREAM) directory, which is stored in the MPEG2-formatted A / V string i (* .m2ts) of the clip-beixun case. The STREAM directory includes an MPEG2-f0rmatted A / v data stream called a clip stream file or edit file, the A / v stream source packet of video and audio data. For example, a packet of video data includes a header and a transmission packet. A source packet includes a packet number, which is usually used as a single address to access the number assigned to the source packet. The transmission packet includes a packet identifier (piD). The transmission packet sequence to which the transmission packet belongs is identified. Each packet in the sequence will have the same PID. The CLIPINF directory includes audit information related to each A / V stream file. The clip information file indicates, in particular, the type, sequence information, program information, and time information of this A / V stream. The column information describes the sequence based on time of arrival (ATC) and system time (STC). For example, the sequence information indicates, for each sequence, the sequence number, the start and end time information, the address of each first source packet, and the transmission PID in each sequence. A sequence of source packets with a constant program content is called a row. The program information indicates 'especially' a program sequence number, a start address of the program sequence, and a PID of a transmission packet in the program sequence. This time information is called feature point information (CPI). An entry point (EP) mapping for CPI. The EP is mapped to a corresponding good file. The abbreviated clip stream includes the source seal and the source seal. This sequence is the basis, especially the sequence of the packets in the sequence. Each pass or multiple forms are displayed with a time stamp of 200425074 (for example, on an Arrival Time Base (ATC) and / or a System Time Base (STC)) mapping. To a source packet address (ie, source packet number), the display timestamp (PTS) and source packet number (SPN) are associated with the -entry point on the AV stream. The PTS and its associated SPN Refers to an entry point of this AV stream. The pointed packet is usually called an entry point packet. The PLAYLIST directory contains one or more playlist files. The concept of a playlist has been introduced to enhance recording and editing / The ease of combining clips. A playlist eaves is a collection of play intervals in these clips. Each play interval is called a play item. In particular, the playlist floor plan identifies each playlist that forms the playlist. Play items, and in particular, 'Each play item is a pair of iN_point and Out-point pointing to the timeline position of the clip (for example, a timestamp displayed on the basis of an ATC or STC.) The playlist also contains sub-play items, and it also provides a pair of IN-point and 0t_point which point to the timeline of the clip play. The playlist file does meet play items and sub-play items, and each play item or sub-play item Both point to a clip or part of it and identify the clip information slot associated with that clip. The clip information file is used, in particular, to map play items to source packets. Clip playlists also contain pointers to specific clip rights. Place (eg, a specific address) playlist tag. A general information file (not shown in the figure) provides general information to manage the copying of the A / V stream recorded on the disc. Except according to one of the inventions The embodiment illustrates the data structure of the recording medium. The first figure illustrates the area of the recording medium. For example, one or more of 200425074

The general information area records general information files, the playlist directory is recorded in one or more playlist directory areas, and each playlist in the playlist directory is recorded in one or more playlist areas of the recording medium, etc. . Fig. 2 illustrates an example of a recording medium having the data structure of Fig. 1 stored thereon. As shown in the figure, the recording medium includes a file system information area, a database area, and an A / V streaming area. The database area includes-general information file and playlist information area and a clip information area. The general information file and the information area of the playlist have the general information file recorded therein, the general information file area, and a playlist directory and a playlist file recorded in a playlist information area. The clip information area has a clip information directory and related clip information files recorded therein. The A / V stream area has A / V streams for various titles recorded therein.

Video and audio materials are usually organized into separate titles; for example, different movies represented by video and audio materials are organized into different titles. In addition, it is possible to organize headings into individual chapters in the same way as books organized into many individual chapters. Due to the large storage capacity, new and high-density recording media (such as BD-ROM and BD-RE discs) may record different titles, various versions of a title, or parts of a title. And therefore, copied from that recording medium. For example, video data representing different shooting angles may be recorded on a recording medium. As another example, versions of titles or parts thereof related to different languages may be recorded on a recording medium. As a further example, a director's version of a title and a screenwriter's version may be recorded on a recording medium. Alternatively, an adult version, a master version (ie, a different parental control version, a child's version, and a child version: not a parental control version) may be recorded on a recording medium. Video angles, such as photography angles, etc., represent different replication strategies, and are called multi-copy path videos ^. And, in these examples, new, high-density recording media (such as BD-ROM) due to large storage capacity may allow still images or pictures to be recorded and reproduced in an organized and / or interactive manner, such as sentence lights sheet. This article will describe the data structure used to manage the copying of still pictures of high-density accounts and X-masters in the 5th recorded media according to the embodiment of the present invention, as well as the recording and copying according to the embodiment of the present invention. Method and equipment for still film. As mentioned above and disclosed below, images can be displayed as a series of slideshows, random / mixed slideshows, or navigable Θ slideshows. A series of slides involves the reproduction of still images, which are in the order set by the playlist and have a limited duration. The copying of the still images can also be performed in synchronization with the audio data. A navigable slide show involves the reproduction of still images with a limited duration, in the order set by, for example, a playlist. Copying proceeds to a pre- or post-still image based on user input. A random / mixed slide is a form of sequence or navigable slide in which the order in which still images are generated is random. 3 and 4 illustrate an embodiment of a data structure and a method of managing still images such as a high-density recording medium of a BD-ROM. As shown in Figure 3, the component data stream and associated data streams (for example, graphics and subtitle streams) of the still image stream are packaged as 200425074 based on the still image

PES packets. That is, each PES packet of the still picture stream includes a single still picture, and the associated PES packet of the associated material includes the associated material associated with the still picture (for example, a copy used to synchronize with the associated still picture). The still pictures are grouped into a still picture unit together with the associated data to be copied synchronously. Based on a still picture unit, the still picture stream and the associated data stream are multiplexed into a still picture file of the MPEG 2 transmission stream.

Figure 3 further shows the clip information file corresponding to the still picture file. The clip information file includes an entry point map (EP-MAP). Each entry point (EP # 1 ~ # k) in the EP map contains their own navigation information to access the header record position of the corresponding still picture unit. Navigation information, for example, includes the source packet number entry point start (SPN_EP__Start) information to indicate the start recording position of the corresponding still picture unit.

Figure 4 shows the playlist of the playback control of the still picture file as described in Figure 3 above. As shown in the figure, the Playltem in the playlist contains IN-picture information and OUT-picture information, which respectively correspond to the start position of the still image of the still picture file to be copied and End position. The sub play item (SubPlayltem) in the playlist contains the entry time (SubPlayltem —In —time) information of the sub play item and the subplayltem exit time (SubPlayltem —OUTjime) information. It is used to associate with the still picture file for each No audio files. The audio data can be synchronized or asynchronously copied with the associated still images. The playlist further includes a playlist mark 9 200425074 (herein referred to as a static mark) indicating each still picture. The information during the display of the still picture and the related data included in the still picture unit can be recorded in the static mark corresponding to the still picture unit. Optionally, the display period information can be included in the playback item. Static tags are especially useful when skipping between pictures during a browsable slide. We will understand that still picture files or parts thereof can be associated with some playlists with mutually different display periods.

Display timestamps (PTSs) are recorded in each PES packet and / or each entry point. A PTS has a value that is proportional to, for example, the conventional program clock reference (PCR) value; therefore, as detailed below, it is proportional to the time basis defined by PCRs called STCs (for example, based on System time of PCRs). As is well known, PCRs are stamps added to packets in the MPEG 2 transport stream according to the MPEG 2 standard. When a static picture has an infinite display period, STCs (e.g., PCR counts) remain the same value, and PTS proportional to it is recorded in the PES packet of the corresponding static picture. Therefore, the same PTS is recorded for both the PES packet with the still picture of the infinite display period and the PES packet of the previous still picture. For example, a duplication device may calculate the difference between PTSs recorded on subsequent entry points or PESs of subsequent still pictures to determine the display period of the second of two consecutive still pictures. When the difference between the PTSs is zero, the duplication device duplicates the corresponding still picture in an infinite display period, which means that the still picture can be duplicated until the user input to provide the opposite instruction is received. Otherwise, the duplication device duplicates the static picture for the duration of the calculation. 10 200425074 In other words, the copying device determines, for example, when copying a slideshow of still pictures, whether the display period of each still picture is infinite or finite. When the display period corresponds to infinity, the copy device does not increase stc but maintains the previous value. Conversely, when the display period is limited, the duplication device guides a series of operations to normally increase the STC. FIG. 5 is a schematic diagram illustrating a part of the structure of an optical disc device to which the present invention can be applied. As shown here, the optical disc device includes an optical read / write head 111 for copying data from an optical disc; a VDp ( Audio and video disc playback) System 112 is used to control the copying operation of the optical read-write head Ul; and it can demodulate the data copied by the optical read-write head lu. The vdP 112 generates an AV stream, which may also be sent to a D / A converter 113 to generate an analog version of the AV stream. According to the present invention, the VDP system 112 can control the optical head m and demodulate the copied data based on user input received from a user interface and navigation and management information recorded on the disc. For example, the VDP system 112 can use the aforementioned method & to create a reference to a static mark in a broadcast rose list and an entry point map in a clip information file to copy a static picture slot. That is, the VDP system and the system 112 can read out a static image of each static picture unit according to the order of the access points (Eρ # ι, # 2, ...) recorded in the access point map. #, Graphic information, and sub-headings translated "β α. After that, the VDP system 112 led a series of operations for copying still pictures, which can be copied into a fixed time period based on the display period information or * PTSs included in the static mark; or (Π) according to the user The main input of is copied in the form of skip copy in each unit corresponding to the 200425074 still picture unit of each static mark. As shown in Figure 6, the VDP system 112 may include at least a switcher 120, a track buffer 121, a TS demultiplexer 122, a video buffer 123, a graphics buffer 124, a subtitle buffer 125, an audio buffer 126, and a video decoder. Decoder 127, graphics decoder 128, subtitle decoder 129, audio decoder 130, microcomputer 131, a first STC generator 140 and a second STC generator 14

The microcomputer 1 3 1 can control the operation of the switcher 1 20 according to a user's input or display period information, so as to selectively convert a still picture (V), graphic data (G), and subtitle data (ST). Transfer it to the execution buffer 121. The TS demultiplexer 122 refers to the packet ID (PID) of the data stream temporarily stored in the execution buffer 121, and distributes the static picture data, graphic data, and subtitle data to the video buffer 1 2 3, graphics Buffer 124 and subtitle buffer 125.

The video decoder 127 can interpret still picture data; the graphics decoder 128 can interpret graphics data; and the subtitle decoder 129 can interpret subtitle data. Thus, for example, a single still picture and related graphics and subtitle data can be copied in synchronization. Similarly, the microcomputer 1 31 controls the operation of the switch 120 and optionally transmits the audio data (A) read from a disc to the track buffer 121. The TS demultiplexer 122 may refer to the packet ID (PID) of the audio data stream temporarily stored in the execution buffer, thereby separating the audio data into the audio buffer 126. The TS demultiplexer 122 separates each tone from the copied audio data stream. 12 200425074 The signal display timestamp (A_PTS) and sends A_PTSs to the audio decoder 1 30. The TS demultiplexer 122 also separates the audio program clock references (A_PCRs) from the copied audio data stream, and sends the A_PCRs to the first STC generator 140, which calculates A-PCR to generate an audio STC. Then, the audio STC (A_STC) is sent to the audio decoder 130. The audio decoder 130 compares A_PTS with A_STC and outputs interpreted audio when they have the same value. In a similar mode, the TS demultiplexer 122 separates each still picture display time stamp (S „_PTS) from the copied still picture data stream, and sends S-PTSs to the video decoder 127 and the graphics decoder. The MPEG decoder 170 »TS demultiplexer 122 formed by the decoder 128 and the subtitle decoder 129 also separates the still picture data program clock references (S-PCRs) from the copied still picture data stream, and S__PCRs is sent to the second STC generator 141, which calculates S1: PCRs to generate a still picture STC. Then, it sends the static STC (S ^ STC) to the MPEG decoder 170. The MPEG decoder 170 continuously sends S_PTS and S ^ STC compares and outputs a still image when they have the same value. If the display period of the still image is not limited, then the microcomputer 1 3 1 controls the second TC generator 1 4 1 to stop its counting operation. If To display another static picture month according to the user's input, the microcomputer 131 loads the pcR obtained from the still picture to be displayed to the second STC generator 1 4 1 and resumes the pCR counting operation. As a result, the disc copying device can use the first First and second ST C generators 140 and 141 use MpEG decoders 170, 425, 74 to copy movie data, and still images recorded on the disc, and perform browseable operations of the still images in response to user input. In terms of browseable slides, for example, 'Since the first and second STC generators 140 and 141 provide separate and well-known STC controls, audio data and still picture data (or static and associated (Picture data) is independently copied, that is, if the user changes the still picture to be displayed as described above, it does not affect the interpretation of the audio data.

In the VDP system 112, an STC adder 151 may be used instead of the second STC generator 141, as shown in FIG. When presenting a still picture with an unlimited display period, the microcomputer 131 controls the STC adder 151 by not applying the generated S_STC to the MPEG decoder 170. If different static pictures are to be displayed, the microcomputer 131 obtains a difference between a PCR obtained from the still picture to be displayed and A_STC copied by the first STC generator 140, and outputs the difference to the STC adder 151 as a PCR. Offset.

The STC adder 151 adds A-STC from the STC generator 140, and adds the PCR transparent offset from the microcomputer 131, and outputs the sum as S_STC to the MPEG decoder 170. As a result, the disc reproduction apparatus can use the MPEG decoder 170. As a result, the disc duplication device can use the S_STC and the output from the STC adder 151, use the MPEG decoder 1 70 for copying movie data, copy the still images recorded on the disc, and perform a browseable slideshow operation of the still images' In response to user typing. Fig. 8 is a diagram illustrating an embodiment of an optical disc recording and reproducing apparatus according to the present invention. As shown in the picture, an AV encoder 9 receives and compiles data 14 200425074

material. The AV encoder 9 outputs encoding data together with encoding information and stream attribute information. A multiplexer 8 multiplexes the encoded data according to the encoding information and the stream attribute information to generate, for example, an MPEG-2 transmission stream. A source packetizer 7 converts the transmission packet from the multiplexer 8 into a source packet according to the audio / video format of the optical disc. As shown in Fig. 8, the AV encoder 9, the multiplexer 8 and the source packetizer 7 are operated by the controller 10. During the recording operation, the controller 10 receives user input and provides control information to the AV encoder 9, the multiplexer 8, and the source packetizer 7. For example, the controller 10 indicates the type of encoding to be performed by the AV encoder 9, the transmission stream to be generated by the multiplexer 8, and the source packet format of the source packetizer 7. The controller 10 further controls a drive 3 to record the output from the source packetizer 7 on the optical disc.

The controller 10 also generates navigation and management information for managing the duplication of audio / video data recorded on the disc. For example, based on the information received through the user interface (for example, a set of instructions stored on a disc, which is provided by a computer system, etc. on an internal network or the Internet), the controller i 〇 controls the drive 3 To record one or more data structures of Figures 1 to 4 on the disc. During copying, the controller 10 controls the drive 3 to copy the data structure. Based on the information contained therein and user input received on the user interface (for example, a recording and copying device or a control button on a remote end associated with the device), the controller controls the drive 3 to Refill the shell material from the disc. For example, as described in the embodiment of the present invention, one or more still images may be copied in accordance with the navigation information in relation to audio data. You 15 200425074

What's more, you can copy an image or set of images as a slideshow or part of a slideshow. As mentioned above, a slide can be synchronized, browseable, etc. 0

A source depacketiaer 4 receives the duplicated source packets and converts them into a data stream (e.g., an MPEG-2 transport packet stream). A demultiplexer ^ demultiplexes the data stream into encoded data. An AV decoder 6 decodes the encoded data to generate original data for the AV encoder 9. During copying The controller 10 controls the operations of the source depacketizer 4, the demultiplexer 5, and the AV decoder 6. During the copy operation, the controller 10 receives the user's turn, and performs the AV decoder 6, the decoder The multiplexer 5 and the source packetizer 4 provide control information. For example, the controller 10 instructs the Av decoder 9 to perform a decoding mode, and instructs the demultiplexer 5 to demultiplex the transmission stream. , And indicate the source packet format of the source depacketizer 4. Although Figure 8 is described as a recording and copying device, we will understand that those parts of Figure 8 that provide recording or copying functions only provide recording or copying devices .

As can be known from the above, the present invention provides a recording medium having a data structure capable of managing static image audio data recorded on a high-density recording medium (for example, a high-density optical disc such as a BD_ROM) This data structure allows the display of still images and audio data by various methods. The method of managing still images of a high-density recording medium in accordance with the present invention provides various static control operations' and allows associated static subtitles or graphic images to Effective link duplication of images. • 16 200425074 times, it can be known that the present invention provides a method and equipment for recording on a high-density recording medium, and is used to manage the still images and audio data recorded on the recording medium. The method and equipment for copying still images and audio data recorded on a high-density recording medium are provided above. Although the present invention is disclosed with a limited number in the embodiments, those skilled in the art can benefit from this technique. Many of these modifications and changes will be understood. For example, although a ROM disk is discussed in several examples, The invention is not limited to the optical disc or the standard of the optical disc. This article means that all such modifications and changes fall within the spirit and scope of the present invention. [Brief description of the drawings] The above features and other advantages of the present invention A clearer understanding will be obtained from the following detailed description with reference to the accompanying drawings, in which: FIG. 1 illustrates an exemplary embodiment of a recording medium or data structure according to the present invention; FIG. 2 illustrates an embodiment of a recording medium, It has the data structure stored in Figure 1; Figures 3 and 4 illustrate a detailed embodiment of a part of the data structure of Figure 1 according to the present invention and a method for managing records in high density Method for still images on media; Figure 5 is a schematic diagram of a part of the structure of an optical disc recording device according to the present invention; Figure 6 is a detailed illustration of a first embodiment 17 200425074 of an optical disc device according to the present invention Structure; FIG. 7 illustrates a detailed structure of a second embodiment of an optical disc apparatus according to the present invention; and FIG. 8 illustrates another embodiment of a recording and reproducing apparatus according to the present invention. [Simple description of component representative symbols] 1 optical disc 2 optical read / write head 3 optical disc drive 4 source depacketizer 5 demultiplexer 6 AV decoder 7 source packer 8 multiplexer 9 AV encoder 10 controller 110 optical disc 111 optical Read / write head 112 Audio and video disc playback system 113 D / A converter 120 Switching control 121 Track buffer 122 Time stamp demultiplexer 123 Video buffer 124 Graphic buffer 125 Subtitle buffer 126 Audio buffer 127 Video decoder 128 Graphic decoder 129 Subtitle decoder 130 Audio decoder 131 Microcomputer 140 STC generator 141 STC generator 151 STC adder 170 MPEG decoder V Still picture ST Subtitle information

18 200425074 G Graphical data A Audio data 19

Claims (1)

200425074 Scope of patent application: 1. A method for copying still picture data and audio data from a recording medium, including: interpreting the still picture data copied from the recording medium according to a separate and independent system time (STC) And audio data. 2. The method described in item 1 of the patent application scope further includes: A first STC is generated based on the still picture data copied from the recording medium; and a second STC is generated based on the audio data copied from the recording medium. 3. The method as described in item 2 of the scope of patent application, wherein: the step of generating the first STC generates the first STC from program clock references (PCRs) in the still picture data; and generating the second STC The step generates the second STC from the PCRs in the audio data. 4. The method as described in item 3 of the scope of patent application, wherein the interpreting step interprets the still picture data and audio data based on the first and second STCs, respectively, and in the respective still picture and audio data. Display timestamps (PTSs). 5. The method as described in item 1 of the scope of patent application, wherein the interpreting step interprets the still picture data and audio data according to the independent STCs, and the timestamps are displayed on the respective still pictures and audio data (PTSs) 〇20 200425074 6. The method described in item 1 of the scope of patent application further includes: copying the transmission of the still picture and audio data_stream; demultiplexing the transmission stream into the still picture data and the audio Data to obtain first program clock references (PCRs) from the still picture data and second PCRs from the audio data; generate first and second STCs from the first and second PCRs; and the interpretation step includes : Interpreting the demultiplexed static picture data based on the first STCs; and interpreting the demultiplexed audio data based on the second STCs. 7. The method according to item 1 of the scope of patent application, wherein: the demultiplexing step further obtains a first display time stamp (PTSs) of the still picture data and a second PTSs of the audio data; and the interpretation The demultiplexed converted static picture data is based on the first STCs and the first PTSs to interpret the still picture data; and the demultiplexed converted audio data is based on the second STCs and the first Two PTSs interpret the static picture data; and. 8. The method according to item 1 of the scope of patent application, further comprising: copying at least one playlist from the recording medium, the playlist including at least one play item and at least one sub-play item, the play item provided for First file copy at least 21 of the still picture data Navigation information, the sub-play item provides navigation information to copy the audio data from a second file; according to the navigation information of the play item, copy the static picture data from the first file; and according to the sub-play Project navigation information, copy the audio data from the second file. 9. The method described in item 8 of the scope of patent application, wherein: The play item provides navigation information for copying display data from the first file, the display data including at least the still picture data and associated data associated with the still picture data; and the step of copying the still picture data copies the Display information. 10. The method described in item 9 of the scope of patent application, wherein the display data does not include audio data. 11. The method according to item 9 of the scope of patent application, wherein the related data includes at least one of graphic data and subtitle data. 12. The method according to item 9 of the scope of patent application, wherein the display data is divided into one or more still picture units so that each still picture unit includes at least one still picture and associated related data. 1 3. The method as described in item 12 of the scope of patent application, wherein the display data is demultiplexed and converted into a transmission stream on one of the still picture units on a still picture unit basis. 14. The method as described in item 13 of the scope of patent application, wherein each elementary stream of the display data is aligned within the still picture unit. 22 200425074 15. The method according to item 14 of the scope of the patent application, wherein each elementary stream is a packetized elementary stream. 16. The method as described in claim 15 in which each static picture element includes a packet from each packetized elementary stream. 17. The method described in item 13 of the scope of patent application, further comprising: Copy a clip information file from the recording medium, the clip information broadcast including at least one entry point map, the entry point map including at least one entry point, which provides at least one address of a still picture in the still picture data; and The step of copying the still picture data is to copy the still picture data from the first file according to the navigation information of the play item and the entry point mapping. 1 8. The method as described in item 17 of the scope of patent application, wherein the entry point mapping includes an entry point associated with each still picture unit. 19. The method according to item 9 of the scope of patent application, wherein the playlist further comprises at least one playlist mark indicating one of the still pictures in the still picture data. 20. The method according to item 9 of the scope of patent application, wherein the playlist mark provides information during a period to copy the still picture indicated by the playlist mark. 2 1. The method according to item 1 of the scope of patent application, further comprising: copying at least one playlist from the recording medium, the playlist including at least one play item and at least one sub play item, the play item 23 200425074 item provided It is used to copy navigation information of at least a still picture stream from a first data stream, and the sub-play item provides navigation information to copy an audio stream from a second data stream; according to the guidance of the play item Browsing information, copying a part of the first data stream to the still picture data; and copying part of the second data stream to the audio data according to the navigation information of the sub-play item. 22. The method according to item 21 of the scope of patent application, wherein the first data stream is a transmission stream. 23. The method according to item 22 of the scope of patent application, wherein the transmission stream includes a packetized basic stream of the still picture data and associated data. 24. A method of copying still picture data and audio data from a recording medium, comprising: generating a first STC of the still picture data based on the still picture data copied from the recording medium; copying from the recording medium According to the audio data, a second STC of the audio data is generated; according to the first STC, the still picture data copied from the recording medium is interpreted; and the second STC is interpreted according to the second STC. Audio. Information. 25 · A device for copying still picture data and audio data from a recording medium 24 200425074 equipment, including: a decoder that interprets the still picture data according to a first system time (STCs); and a decoder based on a second STC The decoder for interpreting the audio data has nothing to do with the first STC. 25